Never use a credit card for credit. The only kind of credit， or debt， that is acceptable is debt to acquire something whose exchange value is extremely likely to increase， like in a home. The exchange value of most things diminishes or vanishes the moment you purchase them. Don’t be in debt to losers.

昨天我是一只狗……今天我是一只狗……明天我可能还是一只狗……唉！这进步的希望真是小啊！

Innovation in oil extraction isn't optional—it's a necessity for sustainability.